Scale



May 27, 1930- H. A. HADLEY 1,759,900

SCALE Filed Nov. 2l, 1927 4 INVENTOR Flg. E HarLanAHdiLqy BY i Z @07 ATTORNEY Patented may 27, 1930 UNHTED STATES Fi-TENT GFFICE HABLAN A. HADLEY, OF ST. JOHNSBURY, VERMONT, ASSIGNOR T E. AND T. FAIR- BANKS AND COMPANY, A CORPCRATION OF VERMONT SCALE Application filed November This invention relates to improvements in scales of that type wherein a pointer is employed to indicate the movement oit-he heam of an equal-arm balance.

An important object ot this invention is the provision in a scale of the character described ol' an indicator tulcrumed on tor-- sion ribbon, said indicator being' normall;Y yieldingly restrained to a predetermined path.

ln a broad aspect, the present vinvention may be described as providi ,g a means for oatingly mounting the indicator comprising a plurality ot spaced elements in parallel planes, lout at right angles to each other, one element pivotally interconnecting said indicator and beam and the other element adapted to act as a guide for the indicator wherebyv when the heam is actuated during;Y a weighing operation the two elements coeac't to impartto the indicator a pivotal movement. The advantages of this construction, among others, include the great multiplication possible and practical 'from the beam, or evenlever, to indicator and the simplicity and accessibility ot structure.

Another object ot the present invention is the provision ot means for varyingl the multiplication from the even-lever to the indicator, the construction providing preferably an adjustable guide slate cooperating with a guide pin mounted on the indicator.

Still another ob'ect of this invention resides in the provision of a scale structure in which the parts will assume their Zero or J neutral position notwithstaudine the t2 ce that the oase o? the scale is not iu a true ho4 l zontal plane.

(lt-her ohjec with certain d hinations ot parts, i'ill he more grirticulsrlv 'l scribed hy reference to the accompanying vingts and pointed out in the appended te'. ot this inver in. together ils ot construe on and comclaims.

In the drawings:

Figure 1 is a perspective elevational view oi' the scale with the in broken lines;

Figure 2 is side view et the scale talien on line Q- ot F igure 1; and

housingl thereo'ie shown Serial No. 234,716.

Figure 3 is a detail view of the guide plate taken on line 3#3 in Figure El.

Similar characters ot reference indicate corresponding )arts throughout the several views.

Referring to Figure 1 of the drawings, there shown a scale, generally indicated hy the reference character 1, which emhdics my invention. The scale is mounted in housing 2 and is fastened to the base ther-eet by any suitable means, as by screws (not shown) seated in serewholes 3 formed in the hase plate 4i ot the scale.

A pair ot opposed standards, or uprights, 5 extend upwardly from the oase plate and a reinforcing rib 6 extends vertically on each of the standards. The upper extremities ot the standards are enlarged to torni a boss T. It is to he understood that the hase plate, standards, ribs and bosses are integral parts of a single wasting. In the hosses 7 are milled the openings S, the lower portions ot uf'hich are V-shaped to term heari surtaces i). These surfaces receive the knife edge pivogs 10 mounted in an even-lever, or beam, 1l, which is a cast having parallel side menibers 12 joined by cross-pieces 13. Eising; from the central portion ot' each side menu oer l2 of the even-lever 11 is an integral upright member 141, the purpose o i which vill be hereinafter set forth.

In the extremities of the side members 1??. are set knife edge pivots 15 on which are 1 iv* otall7 carried the parallels 16. A V-g'rooved agate 17 is firmly cemented between each pair ot lingers 18 of the parallels, the agates acting' as hearing surfaces tor lz 'e edges l5, understood in the 'iitop pins 19 are driven through suitable apetures in lingers 18 tor the purpose oi rco, the parallels on the liniife edges,

Suitably mounted on the. parallels are the commodity and weight pans 20. The parallcls have integral therewith depend-,in stema 21 on which are adjustably mounted the check-posts 22. These check-posts are formed with a reduced, flattened portion on the lower extremities thereof to which flattened 1aortions are suitably attached, as by screws art.

passes through an opening 26 in each checkplate and is retained in position by means ot the lower extremity of the check-posts 22 which pass through an eye formed in each extremity of the check-link 25.

ln order to lin'iit the vertical motion of the even-lever ll, the stop-posts 2T are mounted ou a shell- 28. This shelf also forms an integral part of toe base casting. The stop-posts are threaded, as at 28', for the purpose of allowing vertical adjustment and are adapt,

ed to be retained in adjusted position by means oiC lock nuts 29.

A dashpot is suitably attachedto the base of the scale housing and is adjustable with respect to the scale through t-he medium ol1 a bent rod 8l which is slidably litted in an opening; n a side member l2 oE the evenlev'er. rlf'he bent rod is retained in adjusted position by means of aV set screw The d..shpot performs the function of cushioning` the movements of the even-lever ll. A receptacle 3l, adapted to receive molten lead or lead shot, is attached to one o'f the checkposts for the purpose ol balancing the scale elements, is well understood in the art.

A ap rigidly seated upon the upper extremities, or bosse 7 of standards 5 closthe openings 8 therein. The cap has opposed sci'e\\'-tliieaelcd apertures adapted for the reception of 'the reduced, screw-threaded extremities 3S of the posts These posts are vertically adjustable and are retained in adjusted position by means of nuts 38. A ,guide plate is suitably attached to posts 5.7, as by screws lt-O. The guide-plate has punched therein a laterally extendingr slot -ll substantially centrally thereof. The parallel sides of the slot are brought to a knife edge for purpose hereinafter to be set forth.

lilounted between the upright membe s le is a torsion ribbon, or strip, l2 which is tightly strung.;` between the uprights 14 and is clamped securely in position by means ot' clips /lB au d screws 114-. The longitudinal axis of the guido plate 39 is at right angles to the longitudinal anis of the torsion ribbon. An indicator mounting is rigidly secured to this ribbon substai'itially centrally thereof and o this in-iiunting is suitably attached, by '1 v is @1.6, the indicator eli.

yudine' 'from the indicator mounting is a ,guide pin -lS which is adaptedto extend thniugh the slot l in the guide plate, said slot being` just wide enough to allow the 1 iide pin to move freely therein.

'.lhe construct-ion. outlined above provides i floating tulcrum for the indicator, the taut engrthv of ribbon forming; a pivotal connec- 'ioii between the indicator' and the beam and 'fnl-:rum for the indicator. During a weighinff operation the torsion ribbon element cocts with the guide plate through the medium ol the indicator guide pin whereby the indicator isgiven a pivotal movement.

The multiplication from the beam to the ii'idicator may be varied by raising or lowering the guide plate. As the distance between the ltcrsion ribbon and the guide plato is shortened, the resistance olfered by the torsion ribbon is increased, and, accordingly, the multiplication through the indicator .becomes greater.

A balance weight 48 is attached to the even -lever substantially centrally thereof for the purpose of controlling the distribution of the metal above and below the pivot line of vthe lever. The construction is such that this distribution of metal may be varied.

It may be readily seen that when the housing` of the scale out of a true horizontal plane, the even-lever will plumb itself and the indicator will still point to the Zero point on the chart 49, suitably held in the superstructure 50 of the housing.

Having thus described my invention, what I claim as new and desire to secure by Letters latent of the United States, is z.

l. ln a device of the character described, a lever having' a plurality of uprights integral therewith, a. torsion ribbon attached to said uprigh'ts and an indicator fulcrumed on said ribbon.

2. ln a device of the character described, the combination with base having?)` a lever pivoteil thereon, of a torsion ribbon attached to said lever, said ribbon being normally substantially parallel to said base, and an indicator fulcrumed on said ribbon.

3. In a device of the character described, in combination, a base, a lever ulcrumed thereon., a torsion ribbon on said lever, an indi.- cator fulcrumed on said ribbon and means co-acting with said ribbon whereby a pivotal movement of the indicator is effected.

4l. In a device of the character described, in combination, a base, a lever fulcrumed thereon, a torsion ribbon on said lever, an indicator iulcrumed on said ribbon, and slotted means co-acting with said ribbon whereby a pivotal movement of the indicator is effected.

5. In a device of the character described, in combination, a base, a lever fulcrumed on said base, a. torsion ribbon on said lever, an indicator fulcrumed on said ribbon and means whereby a pivotal movement of said :indicator is effected, said means comprising a guide pin mounted on said indicator and a guide plate (3o-acting therewith.

6. In a device of the character described, in combination, ay base, a lever fulcrumed thereon, a torsion ribbon on said lever, an indicator fulcrumed on said ribbon and means whereby a pivotal movement of said indicatoris effected, said means comprising a. guide pin mounted on said indicator and a guide plate having a slot therein, said guide pin ext-ending through said slot.

7. In a device ot the character described, in combination, a base having a shelf thereon, a lever ulcrumed on said base, a torsion ribbon on said lever, an indicator Jr'ulcrumed on said ribbon and means whereby a pivotal moven'ient ol" said indicator is effected, said neans comprising a guide pin depending Yfrom said indicator and a guide plate having a slet therein mounted on said shelt', said guide pin extending through said slot.

8. In a device ot the character described, the combination with a scale beam and an indicator 'fulcrumed on said beam, ot means for varying the multiplicat-ion from said beam to .said indicator, comprising a vertically ad'- justable member.

In a device ot the character described, the combination ivith a scale beam and an indicator resiliently mounted thereon, of means tor varying the multiplication from said beam to said indicator, said means comprising an element movable relative to and co-operating With said indicator.

l0. In a. device of the character described, the combination with a scale beam and an indicator resilient-ly mounted thereon, of means for varying the multiplication from said beam to said indicator, said means comprising an adjustable plate adapted to co-operate With said indicator.

l1. In a device of the character described, the combination with a scale beam and an indicator resiliontly mounted thereon, ot' means 'for varying the multiplication from said beam to said indicator, said means comprising a vertically adjustable plate, having a slot therein, said plate adapted to co-operatc with said indicator.

l2. In a device of the character described, in combination, a base, a lever fulcrumed thereon, an indicator resiliently mounted on said lever, said indicator having a. guide pin attached thereto, a guide plate adapted to co-act with said guide pin and means mounted on said base for holding said guide plate.

13. In a device ot the character described, in combination, a base, a lever ulcrumed thereon, an indicator resiliently mounted on said lever, said indicator having a guide pin attached thereto, a guide plate adapted to tze-act with i nd guide pin and vertically adjustable meal@ on which said. guide plate is mounted.

lil. In a device of the character described, the combination with a base having a lever mounted thereon, a torsion ribbon carried by said lever and an indicator fulcrumed on said ribbon, of means on said base for varying the leverage exerted on said indicator.

l5. In a device of the character described, the combination with a base having a lever mounted thereon, a torsion ribbon carried by said lever and an indicator fulcrumed on said ribbon, of means on said base for varying the leverage exerted on said indicator comprising a member movable relative to said torsion ribbon.

16. In a device of the character described, the combination with a base having a lever mounted thereon, a torsion ribbon carried by said lever and an indicator ulcrumed on said ribbon, ot means on said base for varying the leverage exerted on said indicator comprising a vertical adjustable guide plate.

In testimony whereof I hereunto affix my gnature this 19th day of November, 1927.

HARLAN A. HADLEY. 

